Casing-Mounted Antenna Layout for Polarization MIMO Stability
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Solution Overview
Problem
In 5G mobile communication systems using millimeter waves, the high propagation and reflection losses limit the effectiveness of reflected waves, making polarization MIMO challenging, especially in portable devices where antenna positions and orientations change during use.
Innovation Solution
A communication apparatus with antenna parts positioned near regions with crossing or twisted normal directions on the casing, allowing for the transmission and reception of orthogonal polarized waves, enhancing polarization MIMO performance even when the device's position or orientation changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If millimeter wave communication is used to increase information transmission capacity, then the amount of information transmitted increases, but propagation loss and reflection loss increase
Solution Approach 1:
The patent changes the frequency parameter from ultrahigh frequency to millimeter wave to increase information transmission capacity. This parameter change directly addresses the need for higher data rates in 5G systems, accepting the trade-off of increased propagation loss in exchange for significantly increased bandwidth and information capacity.
2Adaptability or versatility
If polarization MIMO is introduced to realize MIMO with different polarization directions, then MIMO functionality is achieved, but device complexity increases due to antenna arrangement requirements
Solution Approach 1:
The patent introduces polarization dimension to the antenna system, enabling MIMO functionality by utilizing waves with different polarization directions (horizontal and vertical). This dimensional approach allows the system to achieve spatial diversity without requiring additional physical separation of antennas, thereby managing device complexity while enabling polarization MIMO.
Solution Approach 2:
The patent applies different polarization characteristics to different antenna parts, with some antenna parts configured for horizontal polarization and others for vertical polarization. This local differentiation of polarization quality enables the system to transmit and receive multiple polarized waves simultaneously, achieving polarization MIMO functionality.
3Adaptability or versatility
If antenna parts are positioned on casing surfaces to enable polarization MIMO, then polarization diversity is achieved, but position stability becomes challenging when device orientation changes
Solution Approach 1:
The patent designs antenna parts that can function effectively in multiple orientations and positions on the device casing. By making the antenna system universal and orientation-independent, the patent maintains polarization diversity benefits regardless of how the device is held or oriented during use.
Solution Approach 2:
The patent creates a dynamic antenna system that adapts to changing device orientations. The antenna parts are positioned and configured to maintain effective polarization MIMO operation whether the device is held horizontally, vertically, or at various angles, making the system responsive to dynamic usage conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables more effective use of direct waves in millimeter wave communication, improving communication performance by maintaining polarization MIMO functionality despite changes in device position or orientation.
Implementation Method 1
a plurality of antenna parts configured to receive or transmit a wireless signal
Implementation Method 2
transmit or receive a first wireless signal and a second wireless signal propagating in directions substantially orthogonal to the partial regions and having mutually different polarization directions
Data Source
AI summary
To realize polarization MIMO in a more suitable form in a mobile communication apparatus.A communication apparatus includes a plurality of antenna parts configured to receive or transmit a wireless signal, a communication control part configured to control transmitting or receiving the wireless signal via at least any of the plurality of antenna parts, and a casing housing the communication control part, in which each of the plurality of antenna parts is held near each of a plurality of partial regions normal directions of which cross each other or the normal directions of which are mutually twisted in outer faces of the casing, and transmit or receive a first wireless signal and a second wireless signal propagating in directions substantially orthogonal to the partial regions and having mutually different polarization directions.